We have prepared the following example to guide you through the calculation module. This calculation module
refers to: G. Niemann, H. Winter, B.-R. Höhn: Maschinenelemente Band I: Konstruktion von Verbindungen,
Lagern, Wellen. Springer Verlag, 3. edition, 2001: p.857 Example 4: Splined shaft for a lifting gear
Please login with your user name and your password. Select the module through the tree structure of the Project Manager by double-clicking on the module or clicking on the button ‘New calculation’.
A splined shaft connection with a splined shaft according to DIN ISO 14 is given. The safety against pressure is required. For our calculation example the following input values are given:
|Diameter||= 32 mm|
|Diameter||= 38 mm|
|Number of keys||= 8|
|Key width||= 6|
|Supporting length||= 40 mm|
|Manufacturing according to tolerance field||= H7/IT7|
|Application factor||= 1|
|Nominal operation torque||= 2400 Nm|
|Maximum load peak torque||= 2400 Nm with number of load peaks , no alternating torque|
|Outer diameter of hub||= 45 mm|
|Material shaft||= C45 hardened and tempered|
|Material hub||= C45 hardened and tempered|
To find the right profile, click on the button ‘Selection’.
The profile geometry selection is opened.
Select from the listbox ‘Standard geometry data’ the splined shaft profile according to DIN ISO 14 medium series.
You can refine the profile geometry selection by including specific parameters to find the right profile quicker. Just add the diameter , the number of keys as well the key width. Click on the button ‘Search’.
After clicking the button ‘Search’, only one profile remains. Please take over this profile to the main mask with the button ‘OK’.
Enter ‘40 mm’ for the supporting length .
Use the listbox to select the tolerance field ‘H7/IT7’.
The field ‘Profile’ displays the corresponding tolerance.
Please add now the application factor as well as the nominal operation factor .
Activate the load peaks und enter ‘2400’ for the maximum load peak torque .
Select the number of load peaks from the listbox.
There is no change in load direction, so enter the default setting ‘No alternating torque’ for the ‘kind of load’.
Enter the value ‘45 mm’ for the outer diameter of the hub.
Select the material ‘C45 hardened and tempered’ for the shaft.
Note: In case you need further information on the material, click on the button ‘Material’.
A new window is opened.
Select the hub material ‘C45 hardened and tempered’ from the listbox.
The safeties at operation load and maximum load, the pressures for shaft and hub are determined and displayed immediately in the result panel. In general, the results will be calculated and displayed during every input.
For our calculation example the splined shaft is sufficiently dimensioned. In addition, the message window contains the hint that this shaft-hub-connection can be used.
Click on the button ‘Report’ to create a calculation report. The report contains all detailed results and input values. Using the table of contents, all results can be called up very quickly. The report is available in HTML and PDF format. Save the report in HTML format to open the file later in the web browser or in Word for Windows.
Finally, selecting the button ‘Save’ allows you to save the calculation either on the eAssistant server or on your own workstation.
A standard Windows dialog for saving the file on your workstation appears, providing that the options ‘Enable file
save local’ in the Project Manager and ‘Local’ in the calculation module are activated.
Note: You must not forget that the calculation module has to be closed to activate the option ‘Enable file save local.’
In case you have not activated this option, a new window is opened and you can save the calculation on the eAssistant server.
Please enter a name into the input field ‘Filename’ and click on the button ‘Save’. Then click on the button ‘Refresh’ in the Project Manager. Your saved calculation file is displayed in the window ‘File’.
Our manual is improved continually. Of course we are always interested in your opinion, so we would like to know what you think. We appreciate your feedback and we are looking for ideas, suggestions or criticism. If you have anything to say or if you have any questions, please let us know via phone +49 (0) 531 129 399-0 or email eAssistant@gwj.de.